Carburetor: Rotary type, 6mmPorts: 3Weight: 10.2oz (290g)Displacement: .15 cu in (2.49cc)Horse Power: 1.2hp @ 29,000 RPMBore: 15.0mmStroke: 13.6mmDistance between mounting holes front to back: 0.43" (11mm)Distance between mounting holes side to side: 1.2” (31.5mm)Overall width including mounting flanges: 1.6” (40mm)Overall height from bottom of crankcase to top of head: 3.9" (100mm)Overall length from back of recoil to end of shaft: 3.5” (88mm)Diameter of head at largest point: 1.9” (49mm)Length of shaft: 0.75" (19mm)Length of threaded portion of shaft: 0.47" (12mm)Distance between exhaust mounting holes: 1.1” (27.2mm)This engine also includes mounting holes in the bottom of the crankcase. The specs for these are as follows.Distance between mounting holes side to side: 0.72" (18.2mm)Distance between mounting holes front to rear: 0.83" (21mm)